Assembly unit



April 1930 H. JUNKERS 1,753,051

ASSEMBLY UNIT Filed May 28, 1929 /n venton:

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Patented Apr. 1, 1930 HUGO JUNKERS, F DESSAU, GERMANY ASSEMBLY UNIT Application filed May 28, 1929, Serial No. 366,634, and in Germany Jun 8, 1928.

My invention relates to assembly units which serve for assembling any constructions having several principal members, such as lattice work, spars of airplane wings, and the like, and generally constructions in which at first principal members, such as longitudinal and transverse girders, are assembled by means of assembly units and fixed in their proper position whereupon the subsidiary parts are built up on the principal members.

In view of the stresses to which such units are subjected and with a view'to eliminating relative displacement of the points where the principal members are supported such units heretofore were made very heavy and cumbersome.

According to my invention lighter, cheaper and more readily manipulated assembly units are provided which also permit to ascertain any damage or irregularities.

To this end, I design the assembly units which hold the members in their final position, as plane lattice work parts which are provided with laterally extending means for supporting the principal members.

or other marks are connected with such securing means by which the correct position of the means in a single plane is ascertained.

Preferably the assembly units are arranged to rock about horizontal pivots and are fixed in upright, preferably vertical, position. The horizontal pivots may be arranged in the foundation of a building so that the assembly units when turned down into horizontal position, are not in the way. For ascertaining the correct position of the assembly unit and for detecting any irregularities .a sighting tube is preferably fitted to rock on the unit and when the parts are in proper position, all gauges or other marks must be in the plane in which the sighting tube is rocked.

- In the drawings aflixed to this specification and forming part thereof an assembly unitembodying my invention is illustrated diagrammatically by way of example.

In the drawings Fig. 1 is an elevation, and Fig. 2 is an end elevation'of an assembly unit.

Gauges Referring now to thedrawin s, 1 is the assembly unit which is made from lattice mem bers 2, at the joints 3 of which sockets 3' for the reception of the ends of the principal members 16, say the spars of an airplane wing, are arranged. 12 are uprights suppo ting the assembly unit 1, 13 is a longitudinal brace connecting the uprights 12, and 7 are pivots aligned horizontally about which the brace 13. is adapted to rock. 9 are brackets holding the assembly unit in vertical position.

A. complete erecting stage comprises two assembly units as described, the ends of the spars 16 being supported in either unit.

The sockets 3' are equipped with tubular extensions 4' on the outsides of the assembly units, and 14 are marks or gauges on the ex tensions 4. 10 is a si hting tube fitted to rock on one of the mem ers of each assembly unit 1 for checking the position of all gauges which if in proper position must be in the plane in which the sighting tube 10 is rock mg.

Means such as nuts 18, 19 are provided for holding in position the sockets 3 which are preferably tubular, and for extracting any of the spars 16. p

In operation the two units 1 are rocked about their pivots 7 into vertical position as shown in Fig. 2, and a perpendicular 8 may serve for testing their vertical position. The units are now fixed by therbrackets 9, the position of the gauges 14; is tested by means of the sighting. tube 10, and the spars 16 may now be inserted in the sockets 3 and secured therein by any suitable means, not shown.' The transverse braces and other subsidiary parts may now be secured to the spars 16.

I wish it' to be understood that I do not desire to be limited to the exact details of construction shown and described, for gbvious modifications will occur to a person skilled in the art.

I claim c 1. An assembly unit comprising a templet. of plane lattice work, means on said templet for securing thereto members of the structure to be assembled, said means being adapted to be displaced transversely with respect to 2 33 moaooi said templet, a gauge on each one of said means, and means on said templet for checking the proper position of said gauges.

2. An assembly unit comprising a pair of templets of plane lattice Work, means on each templet for securing thereto members of the structure to be assembled, a pivot about which each templet is fitted to rock, and means for fixing said units in erected position. 10 In testimony whereof I afiix my signature.

HUGO 'JUNKERS. 

